The Pump,centrifugal, cataloged under National Stock Number 4320-01-317-3571, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Gusher Pumps. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-317-3571 |
| Primary Part Number | 5S4521-C |
| Item Name | Pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Gusher Pumps |
| Status | ACTIVE |
| Pumping Element Operating Position | HORIZONTAL |
| Centrifugal Pump Impeller Quantity | 1 |
| Centrifugal Pump Impeller Suction Type | SINGLE |
| Operating Speed at Rated Capacity | 3450.0 REVOLUTIONS PER MINUTE |
| Stage Quantity | 1 |
| Pump Rotation Direction | CLOCKWISE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5S4521-C PRIMARY | Gusher Pumps (USA) |
| Reference | Meaning |
|---|---|
| B770604 | C/1 Advisory reference — outside the item-of-supply concept Ruthman Pump and Engineering, Inc Dba Fulflo Specialties Company |
NSN 4320-01-317-3571 is a Pump,centrifugal, manufactured by Gusher Pumps, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-317-3571 has 1 manufacturer part number on file: 5S4521-C (Gusher Pumps).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-318-9810. Verify interchangeability with system specifications before substitution.
Key specifications for 5S4521-C: Pumping Element Operating Position: HORIZONTAL; Centrifugal Pump Impeller Quantity: 1; Centrifugal Pump Impeller Suction Type: SINGLE; Operating Speed at Rated Capacity: 3450.0 REVOLUTIONS PER MINUTE. 6 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.